How does the Triple Piano work?
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bertpeeters
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Re: How does the Triple Piano work?
Ok, I just received the Triple pedal to go with my Stage 2. I'm gonna try and measure some resistor values tonight. I'll let you know what I find, so we can figure this out.
Last edited by bertpeeters on 31 Jul 2012, 12:22, edited 2 times in total.
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bertpeeters
- Posts: 29
- Joined: 29 Jan 2011, 12:31
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Re: How does the Triple Piano work?
Seems like iaorana was perfectly right. I measured the resistance of tip/sleeve and ring/sleeve.
The sustain pedal is a variable resistor between TS that is infinite (open) when not pressed. From somewhere halfway the resistance goes down from 10k down to 500 when fully pressed.
The other two pedals control the ring/sleeve resistance: infinite when not pressed, 10k when middle (sostenuto) pedal is pressed, 5.6k when left (una corda) pedal is pressed. Pressing both left and middle pedal gives 3.6k, indicating that the pedal resistors are in parallel, not in series.
Ok, now I need to figure out how to connect the RS resistor to the rotor speed socket so I can use one of these pedals (but not both!) to control the speed...
The sustain pedal is a variable resistor between TS that is infinite (open) when not pressed. From somewhere halfway the resistance goes down from 10k down to 500 when fully pressed.
The other two pedals control the ring/sleeve resistance: infinite when not pressed, 10k when middle (sostenuto) pedal is pressed, 5.6k when left (una corda) pedal is pressed. Pressing both left and middle pedal gives 3.6k, indicating that the pedal resistors are in parallel, not in series.
Ok, now I need to figure out how to connect the RS resistor to the rotor speed socket so I can use one of these pedals (but not both!) to control the speed...
Last edited by bertpeeters on 31 Jul 2012, 12:22, edited 2 times in total.
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Guest
Re: How does the Triple Piano work?
@berpeeters: Thank you very much for the info! Indeed it seems like an (electronically) rather simple device, for which the price tag might be a bit too steep. But then a DIY job needs the nice pedals, etc., might be a PITA so maybe the 200 bucks are well worth it.
But in the mean time, this might make it possible to have a Halfpedalling&Pedal Noise Sustain Pedal just with one pedal, say, a Yamaha FC-5.
There is lots of space in this small and sturdy pedal (and easy to open), maybe I will modify mine in order to see if on top of the switch I can place a potentiometer and include a small switch to change from Standard switch to Nord Poti.
Just have to find a potentiometer reacting to pressure or so, might be a problem. Plus check if its exponential, linear, or logarithmic curvature.
Anyhow thanks for the info!!
But in the mean time, this might make it possible to have a Halfpedalling&Pedal Noise Sustain Pedal just with one pedal, say, a Yamaha FC-5.
There is lots of space in this small and sturdy pedal (and easy to open), maybe I will modify mine in order to see if on top of the switch I can place a potentiometer and include a small switch to change from Standard switch to Nord Poti.
Just have to find a potentiometer reacting to pressure or so, might be a problem. Plus check if its exponential, linear, or logarithmic curvature.
Anyhow thanks for the info!!
Last edited by Guest on 31 Jul 2012, 12:22, edited 2 times in total.